1 /* 2 * Copyright (C) 2012 Altera Corporation <www.altera.com> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * - Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * - Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * - Neither the name of the Altera Corporation nor the 13 * names of its contributors may be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL ALTERA CORPORATION BE LIABLE FOR ANY 20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <common.h> 29 #include <asm/io.h> 30 #include <linux/errno.h> 31 #include <wait_bit.h> 32 #include <spi.h> 33 #include <malloc.h> 34 #include "cadence_qspi.h" 35 36 #define CQSPI_REG_POLL_US 1 /* 1us */ 37 #define CQSPI_REG_RETRY 10000 38 #define CQSPI_POLL_IDLE_RETRY 3 39 40 /* Transfer mode */ 41 #define CQSPI_INST_TYPE_SINGLE 0 42 #define CQSPI_INST_TYPE_DUAL 1 43 #define CQSPI_INST_TYPE_QUAD 2 44 45 #define CQSPI_STIG_DATA_LEN_MAX 8 46 47 #define CQSPI_DUMMY_CLKS_PER_BYTE 8 48 #define CQSPI_DUMMY_BYTES_MAX 4 49 50 /**************************************************************************** 51 * Controller's configuration and status register (offset from QSPI_BASE) 52 ****************************************************************************/ 53 #define CQSPI_REG_CONFIG 0x00 54 #define CQSPI_REG_CONFIG_ENABLE BIT(0) 55 #define CQSPI_REG_CONFIG_CLK_POL BIT(1) 56 #define CQSPI_REG_CONFIG_CLK_PHA BIT(2) 57 #define CQSPI_REG_CONFIG_DIRECT BIT(7) 58 #define CQSPI_REG_CONFIG_DECODE BIT(9) 59 #define CQSPI_REG_CONFIG_XIP_IMM BIT(18) 60 #define CQSPI_REG_CONFIG_CHIPSELECT_LSB 10 61 #define CQSPI_REG_CONFIG_BAUD_LSB 19 62 #define CQSPI_REG_CONFIG_IDLE_LSB 31 63 #define CQSPI_REG_CONFIG_CHIPSELECT_MASK 0xF 64 #define CQSPI_REG_CONFIG_BAUD_MASK 0xF 65 66 #define CQSPI_REG_RD_INSTR 0x04 67 #define CQSPI_REG_RD_INSTR_OPCODE_LSB 0 68 #define CQSPI_REG_RD_INSTR_TYPE_INSTR_LSB 8 69 #define CQSPI_REG_RD_INSTR_TYPE_ADDR_LSB 12 70 #define CQSPI_REG_RD_INSTR_TYPE_DATA_LSB 16 71 #define CQSPI_REG_RD_INSTR_MODE_EN_LSB 20 72 #define CQSPI_REG_RD_INSTR_DUMMY_LSB 24 73 #define CQSPI_REG_RD_INSTR_TYPE_INSTR_MASK 0x3 74 #define CQSPI_REG_RD_INSTR_TYPE_ADDR_MASK 0x3 75 #define CQSPI_REG_RD_INSTR_TYPE_DATA_MASK 0x3 76 #define CQSPI_REG_RD_INSTR_DUMMY_MASK 0x1F 77 78 #define CQSPI_REG_WR_INSTR 0x08 79 #define CQSPI_REG_WR_INSTR_OPCODE_LSB 0 80 81 #define CQSPI_REG_DELAY 0x0C 82 #define CQSPI_REG_DELAY_TSLCH_LSB 0 83 #define CQSPI_REG_DELAY_TCHSH_LSB 8 84 #define CQSPI_REG_DELAY_TSD2D_LSB 16 85 #define CQSPI_REG_DELAY_TSHSL_LSB 24 86 #define CQSPI_REG_DELAY_TSLCH_MASK 0xFF 87 #define CQSPI_REG_DELAY_TCHSH_MASK 0xFF 88 #define CQSPI_REG_DELAY_TSD2D_MASK 0xFF 89 #define CQSPI_REG_DELAY_TSHSL_MASK 0xFF 90 91 #define CQSPI_REG_RD_DATA_CAPTURE 0x10 92 #define CQSPI_REG_RD_DATA_CAPTURE_BYPASS BIT(0) 93 #define CQSPI_REG_RD_DATA_CAPTURE_DELAY_LSB 1 94 #define CQSPI_REG_RD_DATA_CAPTURE_DELAY_MASK 0xF 95 96 #define CQSPI_REG_SIZE 0x14 97 #define CQSPI_REG_SIZE_ADDRESS_LSB 0 98 #define CQSPI_REG_SIZE_PAGE_LSB 4 99 #define CQSPI_REG_SIZE_BLOCK_LSB 16 100 #define CQSPI_REG_SIZE_ADDRESS_MASK 0xF 101 #define CQSPI_REG_SIZE_PAGE_MASK 0xFFF 102 #define CQSPI_REG_SIZE_BLOCK_MASK 0x3F 103 104 #define CQSPI_REG_SRAMPARTITION 0x18 105 #define CQSPI_REG_INDIRECTTRIGGER 0x1C 106 107 #define CQSPI_REG_REMAP 0x24 108 #define CQSPI_REG_MODE_BIT 0x28 109 110 #define CQSPI_REG_SDRAMLEVEL 0x2C 111 #define CQSPI_REG_SDRAMLEVEL_RD_LSB 0 112 #define CQSPI_REG_SDRAMLEVEL_WR_LSB 16 113 #define CQSPI_REG_SDRAMLEVEL_RD_MASK 0xFFFF 114 #define CQSPI_REG_SDRAMLEVEL_WR_MASK 0xFFFF 115 116 #define CQSPI_REG_IRQSTATUS 0x40 117 #define CQSPI_REG_IRQMASK 0x44 118 119 #define CQSPI_REG_INDIRECTRD 0x60 120 #define CQSPI_REG_INDIRECTRD_START BIT(0) 121 #define CQSPI_REG_INDIRECTRD_CANCEL BIT(1) 122 #define CQSPI_REG_INDIRECTRD_INPROGRESS BIT(2) 123 #define CQSPI_REG_INDIRECTRD_DONE BIT(5) 124 125 #define CQSPI_REG_INDIRECTRDWATERMARK 0x64 126 #define CQSPI_REG_INDIRECTRDSTARTADDR 0x68 127 #define CQSPI_REG_INDIRECTRDBYTES 0x6C 128 129 #define CQSPI_REG_CMDCTRL 0x90 130 #define CQSPI_REG_CMDCTRL_EXECUTE BIT(0) 131 #define CQSPI_REG_CMDCTRL_INPROGRESS BIT(1) 132 #define CQSPI_REG_CMDCTRL_DUMMY_LSB 7 133 #define CQSPI_REG_CMDCTRL_WR_BYTES_LSB 12 134 #define CQSPI_REG_CMDCTRL_WR_EN_LSB 15 135 #define CQSPI_REG_CMDCTRL_ADD_BYTES_LSB 16 136 #define CQSPI_REG_CMDCTRL_ADDR_EN_LSB 19 137 #define CQSPI_REG_CMDCTRL_RD_BYTES_LSB 20 138 #define CQSPI_REG_CMDCTRL_RD_EN_LSB 23 139 #define CQSPI_REG_CMDCTRL_OPCODE_LSB 24 140 #define CQSPI_REG_CMDCTRL_DUMMY_MASK 0x1F 141 #define CQSPI_REG_CMDCTRL_WR_BYTES_MASK 0x7 142 #define CQSPI_REG_CMDCTRL_ADD_BYTES_MASK 0x3 143 #define CQSPI_REG_CMDCTRL_RD_BYTES_MASK 0x7 144 #define CQSPI_REG_CMDCTRL_OPCODE_MASK 0xFF 145 146 #define CQSPI_REG_INDIRECTWR 0x70 147 #define CQSPI_REG_INDIRECTWR_START BIT(0) 148 #define CQSPI_REG_INDIRECTWR_CANCEL BIT(1) 149 #define CQSPI_REG_INDIRECTWR_INPROGRESS BIT(2) 150 #define CQSPI_REG_INDIRECTWR_DONE BIT(5) 151 152 #define CQSPI_REG_INDIRECTWRWATERMARK 0x74 153 #define CQSPI_REG_INDIRECTWRSTARTADDR 0x78 154 #define CQSPI_REG_INDIRECTWRBYTES 0x7C 155 156 #define CQSPI_REG_CMDADDRESS 0x94 157 #define CQSPI_REG_CMDREADDATALOWER 0xA0 158 #define CQSPI_REG_CMDREADDATAUPPER 0xA4 159 #define CQSPI_REG_CMDWRITEDATALOWER 0xA8 160 #define CQSPI_REG_CMDWRITEDATAUPPER 0xAC 161 162 #define CQSPI_REG_IS_IDLE(base) \ 163 ((readl(base + CQSPI_REG_CONFIG) >> \ 164 CQSPI_REG_CONFIG_IDLE_LSB) & 0x1) 165 166 #define CQSPI_GET_RD_SRAM_LEVEL(reg_base) \ 167 (((readl(reg_base + CQSPI_REG_SDRAMLEVEL)) >> \ 168 CQSPI_REG_SDRAMLEVEL_RD_LSB) & CQSPI_REG_SDRAMLEVEL_RD_MASK) 169 170 #define CQSPI_GET_WR_SRAM_LEVEL(reg_base) \ 171 (((readl(reg_base + CQSPI_REG_SDRAMLEVEL)) >> \ 172 CQSPI_REG_SDRAMLEVEL_WR_LSB) & CQSPI_REG_SDRAMLEVEL_WR_MASK) 173 174 static unsigned int cadence_qspi_apb_cmd2addr(const unsigned char *addr_buf, 175 unsigned int addr_width) 176 { 177 unsigned int addr; 178 179 addr = (addr_buf[0] << 16) | (addr_buf[1] << 8) | addr_buf[2]; 180 181 if (addr_width == 4) 182 addr = (addr << 8) | addr_buf[3]; 183 184 return addr; 185 } 186 187 void cadence_qspi_apb_controller_enable(void *reg_base) 188 { 189 unsigned int reg; 190 reg = readl(reg_base + CQSPI_REG_CONFIG); 191 reg |= CQSPI_REG_CONFIG_ENABLE; 192 writel(reg, reg_base + CQSPI_REG_CONFIG); 193 } 194 195 void cadence_qspi_apb_controller_disable(void *reg_base) 196 { 197 unsigned int reg; 198 reg = readl(reg_base + CQSPI_REG_CONFIG); 199 reg &= ~CQSPI_REG_CONFIG_ENABLE; 200 writel(reg, reg_base + CQSPI_REG_CONFIG); 201 } 202 203 /* Return 1 if idle, otherwise return 0 (busy). */ 204 static unsigned int cadence_qspi_wait_idle(void *reg_base) 205 { 206 unsigned int start, count = 0; 207 /* timeout in unit of ms */ 208 unsigned int timeout = 5000; 209 210 start = get_timer(0); 211 for ( ; get_timer(start) < timeout ; ) { 212 if (CQSPI_REG_IS_IDLE(reg_base)) 213 count++; 214 else 215 count = 0; 216 /* 217 * Ensure the QSPI controller is in true idle state after 218 * reading back the same idle status consecutively 219 */ 220 if (count >= CQSPI_POLL_IDLE_RETRY) 221 return 1; 222 } 223 224 /* Timeout, still in busy mode. */ 225 printf("QSPI: QSPI is still busy after poll for %d times.\n", 226 CQSPI_REG_RETRY); 227 return 0; 228 } 229 230 void cadence_qspi_apb_readdata_capture(void *reg_base, 231 unsigned int bypass, unsigned int delay) 232 { 233 unsigned int reg; 234 cadence_qspi_apb_controller_disable(reg_base); 235 236 reg = readl(reg_base + CQSPI_REG_RD_DATA_CAPTURE); 237 238 if (bypass) 239 reg |= CQSPI_REG_RD_DATA_CAPTURE_BYPASS; 240 else 241 reg &= ~CQSPI_REG_RD_DATA_CAPTURE_BYPASS; 242 243 reg &= ~(CQSPI_REG_RD_DATA_CAPTURE_DELAY_MASK 244 << CQSPI_REG_RD_DATA_CAPTURE_DELAY_LSB); 245 246 reg |= (delay & CQSPI_REG_RD_DATA_CAPTURE_DELAY_MASK) 247 << CQSPI_REG_RD_DATA_CAPTURE_DELAY_LSB; 248 249 writel(reg, reg_base + CQSPI_REG_RD_DATA_CAPTURE); 250 251 cadence_qspi_apb_controller_enable(reg_base); 252 } 253 254 void cadence_qspi_apb_config_baudrate_div(void *reg_base, 255 unsigned int ref_clk_hz, unsigned int sclk_hz) 256 { 257 unsigned int reg; 258 unsigned int div; 259 260 cadence_qspi_apb_controller_disable(reg_base); 261 reg = readl(reg_base + CQSPI_REG_CONFIG); 262 reg &= ~(CQSPI_REG_CONFIG_BAUD_MASK << CQSPI_REG_CONFIG_BAUD_LSB); 263 264 /* 265 * The baud_div field in the config reg is 4 bits, and the ref clock is 266 * divided by 2 * (baud_div + 1). Round up the divider to ensure the 267 * SPI clock rate is less than or equal to the requested clock rate. 268 */ 269 div = DIV_ROUND_UP(ref_clk_hz, sclk_hz * 2) - 1; 270 271 /* ensure the baud rate doesn't exceed the max value */ 272 if (div > CQSPI_REG_CONFIG_BAUD_MASK) 273 div = CQSPI_REG_CONFIG_BAUD_MASK; 274 275 debug("%s: ref_clk %dHz sclk %dHz Div 0x%x, actual %dHz\n", __func__, 276 ref_clk_hz, sclk_hz, div, ref_clk_hz / (2 * (div + 1))); 277 278 reg |= (div << CQSPI_REG_CONFIG_BAUD_LSB); 279 writel(reg, reg_base + CQSPI_REG_CONFIG); 280 281 cadence_qspi_apb_controller_enable(reg_base); 282 } 283 284 void cadence_qspi_apb_set_clk_mode(void *reg_base, uint mode) 285 { 286 unsigned int reg; 287 288 cadence_qspi_apb_controller_disable(reg_base); 289 reg = readl(reg_base + CQSPI_REG_CONFIG); 290 reg &= ~(CQSPI_REG_CONFIG_CLK_POL | CQSPI_REG_CONFIG_CLK_PHA); 291 292 if (mode & SPI_CPOL) 293 reg |= CQSPI_REG_CONFIG_CLK_POL; 294 if (mode & SPI_CPHA) 295 reg |= CQSPI_REG_CONFIG_CLK_PHA; 296 297 writel(reg, reg_base + CQSPI_REG_CONFIG); 298 299 cadence_qspi_apb_controller_enable(reg_base); 300 } 301 302 void cadence_qspi_apb_chipselect(void *reg_base, 303 unsigned int chip_select, unsigned int decoder_enable) 304 { 305 unsigned int reg; 306 307 cadence_qspi_apb_controller_disable(reg_base); 308 309 debug("%s : chipselect %d decode %d\n", __func__, chip_select, 310 decoder_enable); 311 312 reg = readl(reg_base + CQSPI_REG_CONFIG); 313 /* docoder */ 314 if (decoder_enable) { 315 reg |= CQSPI_REG_CONFIG_DECODE; 316 } else { 317 reg &= ~CQSPI_REG_CONFIG_DECODE; 318 /* Convert CS if without decoder. 319 * CS0 to 4b'1110 320 * CS1 to 4b'1101 321 * CS2 to 4b'1011 322 * CS3 to 4b'0111 323 */ 324 chip_select = 0xF & ~(1 << chip_select); 325 } 326 327 reg &= ~(CQSPI_REG_CONFIG_CHIPSELECT_MASK 328 << CQSPI_REG_CONFIG_CHIPSELECT_LSB); 329 reg |= (chip_select & CQSPI_REG_CONFIG_CHIPSELECT_MASK) 330 << CQSPI_REG_CONFIG_CHIPSELECT_LSB; 331 writel(reg, reg_base + CQSPI_REG_CONFIG); 332 333 cadence_qspi_apb_controller_enable(reg_base); 334 } 335 336 void cadence_qspi_apb_delay(void *reg_base, 337 unsigned int ref_clk, unsigned int sclk_hz, 338 unsigned int tshsl_ns, unsigned int tsd2d_ns, 339 unsigned int tchsh_ns, unsigned int tslch_ns) 340 { 341 unsigned int ref_clk_ns; 342 unsigned int sclk_ns; 343 unsigned int tshsl, tchsh, tslch, tsd2d; 344 unsigned int reg; 345 346 cadence_qspi_apb_controller_disable(reg_base); 347 348 /* Convert to ns. */ 349 ref_clk_ns = DIV_ROUND_UP(1000000000, ref_clk); 350 351 /* Convert to ns. */ 352 sclk_ns = DIV_ROUND_UP(1000000000, sclk_hz); 353 354 /* The controller adds additional delay to that programmed in the reg */ 355 if (tshsl_ns >= sclk_ns + ref_clk_ns) 356 tshsl_ns -= sclk_ns + ref_clk_ns; 357 if (tchsh_ns >= sclk_ns + 3 * ref_clk_ns) 358 tchsh_ns -= sclk_ns + 3 * ref_clk_ns; 359 tshsl = DIV_ROUND_UP(tshsl_ns, ref_clk_ns); 360 tchsh = DIV_ROUND_UP(tchsh_ns, ref_clk_ns); 361 tslch = DIV_ROUND_UP(tslch_ns, ref_clk_ns); 362 tsd2d = DIV_ROUND_UP(tsd2d_ns, ref_clk_ns); 363 364 reg = ((tshsl & CQSPI_REG_DELAY_TSHSL_MASK) 365 << CQSPI_REG_DELAY_TSHSL_LSB); 366 reg |= ((tchsh & CQSPI_REG_DELAY_TCHSH_MASK) 367 << CQSPI_REG_DELAY_TCHSH_LSB); 368 reg |= ((tslch & CQSPI_REG_DELAY_TSLCH_MASK) 369 << CQSPI_REG_DELAY_TSLCH_LSB); 370 reg |= ((tsd2d & CQSPI_REG_DELAY_TSD2D_MASK) 371 << CQSPI_REG_DELAY_TSD2D_LSB); 372 writel(reg, reg_base + CQSPI_REG_DELAY); 373 374 cadence_qspi_apb_controller_enable(reg_base); 375 } 376 377 void cadence_qspi_apb_controller_init(struct cadence_spi_platdata *plat) 378 { 379 unsigned reg; 380 381 cadence_qspi_apb_controller_disable(plat->regbase); 382 383 /* Configure the device size and address bytes */ 384 reg = readl(plat->regbase + CQSPI_REG_SIZE); 385 /* Clear the previous value */ 386 reg &= ~(CQSPI_REG_SIZE_PAGE_MASK << CQSPI_REG_SIZE_PAGE_LSB); 387 reg &= ~(CQSPI_REG_SIZE_BLOCK_MASK << CQSPI_REG_SIZE_BLOCK_LSB); 388 reg |= (plat->page_size << CQSPI_REG_SIZE_PAGE_LSB); 389 reg |= (plat->block_size << CQSPI_REG_SIZE_BLOCK_LSB); 390 writel(reg, plat->regbase + CQSPI_REG_SIZE); 391 392 /* Configure the remap address register, no remap */ 393 writel(0, plat->regbase + CQSPI_REG_REMAP); 394 395 /* Indirect mode configurations */ 396 writel(plat->fifo_depth / 2, plat->regbase + CQSPI_REG_SRAMPARTITION); 397 398 /* Disable all interrupts */ 399 writel(0, plat->regbase + CQSPI_REG_IRQMASK); 400 401 cadence_qspi_apb_controller_enable(plat->regbase); 402 } 403 404 static int cadence_qspi_apb_exec_flash_cmd(void *reg_base, 405 unsigned int reg) 406 { 407 unsigned int retry = CQSPI_REG_RETRY; 408 409 /* Write the CMDCTRL without start execution. */ 410 writel(reg, reg_base + CQSPI_REG_CMDCTRL); 411 /* Start execute */ 412 reg |= CQSPI_REG_CMDCTRL_EXECUTE; 413 writel(reg, reg_base + CQSPI_REG_CMDCTRL); 414 415 while (retry--) { 416 reg = readl(reg_base + CQSPI_REG_CMDCTRL); 417 if ((reg & CQSPI_REG_CMDCTRL_INPROGRESS) == 0) 418 break; 419 udelay(1); 420 } 421 422 if (!retry) { 423 printf("QSPI: flash command execution timeout\n"); 424 return -EIO; 425 } 426 427 /* Polling QSPI idle status. */ 428 if (!cadence_qspi_wait_idle(reg_base)) 429 return -EIO; 430 431 return 0; 432 } 433 434 /* For command RDID, RDSR. */ 435 int cadence_qspi_apb_command_read(void *reg_base, 436 unsigned int cmdlen, const u8 *cmdbuf, unsigned int rxlen, 437 u8 *rxbuf) 438 { 439 unsigned int reg; 440 unsigned int read_len; 441 int status; 442 443 if (!cmdlen || rxlen > CQSPI_STIG_DATA_LEN_MAX || rxbuf == NULL) { 444 printf("QSPI: Invalid input arguments cmdlen %d rxlen %d\n", 445 cmdlen, rxlen); 446 return -EINVAL; 447 } 448 449 reg = cmdbuf[0] << CQSPI_REG_CMDCTRL_OPCODE_LSB; 450 451 reg |= (0x1 << CQSPI_REG_CMDCTRL_RD_EN_LSB); 452 453 /* 0 means 1 byte. */ 454 reg |= (((rxlen - 1) & CQSPI_REG_CMDCTRL_RD_BYTES_MASK) 455 << CQSPI_REG_CMDCTRL_RD_BYTES_LSB); 456 status = cadence_qspi_apb_exec_flash_cmd(reg_base, reg); 457 if (status != 0) 458 return status; 459 460 reg = readl(reg_base + CQSPI_REG_CMDREADDATALOWER); 461 462 /* Put the read value into rx_buf */ 463 read_len = (rxlen > 4) ? 4 : rxlen; 464 memcpy(rxbuf, ®, read_len); 465 rxbuf += read_len; 466 467 if (rxlen > 4) { 468 reg = readl(reg_base + CQSPI_REG_CMDREADDATAUPPER); 469 470 read_len = rxlen - read_len; 471 memcpy(rxbuf, ®, read_len); 472 } 473 return 0; 474 } 475 476 /* For commands: WRSR, WREN, WRDI, CHIP_ERASE, BE, etc. */ 477 int cadence_qspi_apb_command_write(void *reg_base, unsigned int cmdlen, 478 const u8 *cmdbuf, unsigned int txlen, const u8 *txbuf) 479 { 480 unsigned int reg = 0; 481 unsigned int addr_value; 482 unsigned int wr_data; 483 unsigned int wr_len; 484 485 if (!cmdlen || cmdlen > 5 || txlen > 8 || cmdbuf == NULL) { 486 printf("QSPI: Invalid input arguments cmdlen %d txlen %d\n", 487 cmdlen, txlen); 488 return -EINVAL; 489 } 490 491 reg |= cmdbuf[0] << CQSPI_REG_CMDCTRL_OPCODE_LSB; 492 493 if (cmdlen == 4 || cmdlen == 5) { 494 /* Command with address */ 495 reg |= (0x1 << CQSPI_REG_CMDCTRL_ADDR_EN_LSB); 496 /* Number of bytes to write. */ 497 reg |= ((cmdlen - 2) & CQSPI_REG_CMDCTRL_ADD_BYTES_MASK) 498 << CQSPI_REG_CMDCTRL_ADD_BYTES_LSB; 499 /* Get address */ 500 addr_value = cadence_qspi_apb_cmd2addr(&cmdbuf[1], 501 cmdlen >= 5 ? 4 : 3); 502 503 writel(addr_value, reg_base + CQSPI_REG_CMDADDRESS); 504 } 505 506 if (txlen) { 507 /* writing data = yes */ 508 reg |= (0x1 << CQSPI_REG_CMDCTRL_WR_EN_LSB); 509 reg |= ((txlen - 1) & CQSPI_REG_CMDCTRL_WR_BYTES_MASK) 510 << CQSPI_REG_CMDCTRL_WR_BYTES_LSB; 511 512 wr_len = txlen > 4 ? 4 : txlen; 513 memcpy(&wr_data, txbuf, wr_len); 514 writel(wr_data, reg_base + 515 CQSPI_REG_CMDWRITEDATALOWER); 516 517 if (txlen > 4) { 518 txbuf += wr_len; 519 wr_len = txlen - wr_len; 520 memcpy(&wr_data, txbuf, wr_len); 521 writel(wr_data, reg_base + 522 CQSPI_REG_CMDWRITEDATAUPPER); 523 } 524 } 525 526 /* Execute the command */ 527 return cadence_qspi_apb_exec_flash_cmd(reg_base, reg); 528 } 529 530 /* Opcode + Address (3/4 bytes) + dummy bytes (0-4 bytes) */ 531 int cadence_qspi_apb_indirect_read_setup(struct cadence_spi_platdata *plat, 532 unsigned int cmdlen, unsigned int rx_width, const u8 *cmdbuf) 533 { 534 unsigned int reg; 535 unsigned int rd_reg; 536 unsigned int addr_value; 537 unsigned int dummy_clk; 538 unsigned int dummy_bytes; 539 unsigned int addr_bytes; 540 541 /* 542 * Identify addr_byte. All NOR flash device drivers are using fast read 543 * which always expecting 1 dummy byte, 1 cmd byte and 3/4 addr byte. 544 * With that, the length is in value of 5 or 6. Only FRAM chip from 545 * ramtron using normal read (which won't need dummy byte). 546 * Unlikely NOR flash using normal read due to performance issue. 547 */ 548 if (cmdlen >= 5) 549 /* to cater fast read where cmd + addr + dummy */ 550 addr_bytes = cmdlen - 2; 551 else 552 /* for normal read (only ramtron as of now) */ 553 addr_bytes = cmdlen - 1; 554 555 /* Setup the indirect trigger address */ 556 writel(plat->trigger_address, 557 plat->regbase + CQSPI_REG_INDIRECTTRIGGER); 558 559 /* Configure the opcode */ 560 rd_reg = cmdbuf[0] << CQSPI_REG_RD_INSTR_OPCODE_LSB; 561 562 if (rx_width & SPI_RX_QUAD) 563 /* Instruction and address at DQ0, data at DQ0-3. */ 564 rd_reg |= CQSPI_INST_TYPE_QUAD << CQSPI_REG_RD_INSTR_TYPE_DATA_LSB; 565 566 /* Get address */ 567 addr_value = cadence_qspi_apb_cmd2addr(&cmdbuf[1], addr_bytes); 568 writel(addr_value, plat->regbase + CQSPI_REG_INDIRECTRDSTARTADDR); 569 570 /* The remaining lenght is dummy bytes. */ 571 dummy_bytes = cmdlen - addr_bytes - 1; 572 if (dummy_bytes) { 573 if (dummy_bytes > CQSPI_DUMMY_BYTES_MAX) 574 dummy_bytes = CQSPI_DUMMY_BYTES_MAX; 575 576 rd_reg |= (1 << CQSPI_REG_RD_INSTR_MODE_EN_LSB); 577 #if defined(CONFIG_SPL_SPI_XIP) && defined(CONFIG_SPL_BUILD) 578 writel(0x0, plat->regbase + CQSPI_REG_MODE_BIT); 579 #else 580 writel(0xFF, plat->regbase + CQSPI_REG_MODE_BIT); 581 #endif 582 583 /* Convert to clock cycles. */ 584 dummy_clk = dummy_bytes * CQSPI_DUMMY_CLKS_PER_BYTE; 585 /* Need to minus the mode byte (8 clocks). */ 586 dummy_clk -= CQSPI_DUMMY_CLKS_PER_BYTE; 587 588 if (dummy_clk) 589 rd_reg |= (dummy_clk & CQSPI_REG_RD_INSTR_DUMMY_MASK) 590 << CQSPI_REG_RD_INSTR_DUMMY_LSB; 591 } 592 593 writel(rd_reg, plat->regbase + CQSPI_REG_RD_INSTR); 594 595 /* set device size */ 596 reg = readl(plat->regbase + CQSPI_REG_SIZE); 597 reg &= ~CQSPI_REG_SIZE_ADDRESS_MASK; 598 reg |= (addr_bytes - 1); 599 writel(reg, plat->regbase + CQSPI_REG_SIZE); 600 return 0; 601 } 602 603 static u32 cadence_qspi_get_rd_sram_level(struct cadence_spi_platdata *plat) 604 { 605 u32 reg = readl(plat->regbase + CQSPI_REG_SDRAMLEVEL); 606 reg >>= CQSPI_REG_SDRAMLEVEL_RD_LSB; 607 return reg & CQSPI_REG_SDRAMLEVEL_RD_MASK; 608 } 609 610 static int cadence_qspi_wait_for_data(struct cadence_spi_platdata *plat) 611 { 612 unsigned int timeout = 10000; 613 u32 reg; 614 615 while (timeout--) { 616 reg = cadence_qspi_get_rd_sram_level(plat); 617 if (reg) 618 return reg; 619 udelay(1); 620 } 621 622 return -ETIMEDOUT; 623 } 624 625 int cadence_qspi_apb_indirect_read_execute(struct cadence_spi_platdata *plat, 626 unsigned int n_rx, u8 *rxbuf) 627 { 628 unsigned int remaining = n_rx; 629 unsigned int bytes_to_read = 0; 630 int ret; 631 632 writel(n_rx, plat->regbase + CQSPI_REG_INDIRECTRDBYTES); 633 634 /* Start the indirect read transfer */ 635 writel(CQSPI_REG_INDIRECTRD_START, 636 plat->regbase + CQSPI_REG_INDIRECTRD); 637 638 while (remaining > 0) { 639 ret = cadence_qspi_wait_for_data(plat); 640 if (ret < 0) { 641 printf("Indirect write timed out (%i)\n", ret); 642 goto failrd; 643 } 644 645 bytes_to_read = ret; 646 647 while (bytes_to_read != 0) { 648 bytes_to_read *= plat->fifo_width; 649 bytes_to_read = bytes_to_read > remaining ? 650 remaining : bytes_to_read; 651 /* 652 * Handle non-4-byte aligned access to avoid 653 * data abort. 654 */ 655 if (((uintptr_t)rxbuf % 4) || (bytes_to_read % 4)) 656 readsb(plat->ahbbase, rxbuf, bytes_to_read); 657 else 658 readsl(plat->ahbbase, rxbuf, 659 bytes_to_read >> 2); 660 rxbuf += bytes_to_read; 661 remaining -= bytes_to_read; 662 bytes_to_read = cadence_qspi_get_rd_sram_level(plat); 663 } 664 } 665 666 /* Check indirect done status */ 667 ret = wait_for_bit_le32(plat->regbase + CQSPI_REG_INDIRECTRD, 668 CQSPI_REG_INDIRECTRD_DONE, 1, 10, 0); 669 if (ret) { 670 printf("Indirect read completion error (%i)\n", ret); 671 goto failrd; 672 } 673 674 /* Clear indirect completion status */ 675 writel(CQSPI_REG_INDIRECTRD_DONE, 676 plat->regbase + CQSPI_REG_INDIRECTRD); 677 678 return 0; 679 680 failrd: 681 /* Cancel the indirect read */ 682 writel(CQSPI_REG_INDIRECTRD_CANCEL, 683 plat->regbase + CQSPI_REG_INDIRECTRD); 684 return ret; 685 } 686 687 /* Opcode + Address (3/4 bytes) */ 688 int cadence_qspi_apb_indirect_write_setup(struct cadence_spi_platdata *plat, 689 unsigned int cmdlen, const u8 *cmdbuf) 690 { 691 unsigned int reg; 692 unsigned int addr_bytes = cmdlen > 4 ? 4 : 3; 693 694 if (cmdlen < 4 || cmdbuf == NULL) { 695 printf("QSPI: iInvalid input argument, len %d cmdbuf 0x%08x\n", 696 cmdlen, (unsigned int)cmdbuf); 697 return -EINVAL; 698 } 699 /* Setup the indirect trigger address */ 700 writel(plat->trigger_address, 701 plat->regbase + CQSPI_REG_INDIRECTTRIGGER); 702 703 /* Configure the opcode */ 704 reg = cmdbuf[0] << CQSPI_REG_WR_INSTR_OPCODE_LSB; 705 writel(reg, plat->regbase + CQSPI_REG_WR_INSTR); 706 707 /* Setup write address. */ 708 reg = cadence_qspi_apb_cmd2addr(&cmdbuf[1], addr_bytes); 709 writel(reg, plat->regbase + CQSPI_REG_INDIRECTWRSTARTADDR); 710 711 reg = readl(plat->regbase + CQSPI_REG_SIZE); 712 reg &= ~CQSPI_REG_SIZE_ADDRESS_MASK; 713 reg |= (addr_bytes - 1); 714 writel(reg, plat->regbase + CQSPI_REG_SIZE); 715 return 0; 716 } 717 718 int cadence_qspi_apb_indirect_write_execute(struct cadence_spi_platdata *plat, 719 unsigned int n_tx, const u8 *txbuf) 720 { 721 unsigned int page_size = plat->page_size; 722 unsigned int remaining = n_tx; 723 const u8 *bb_txbuf = txbuf; 724 void *bounce_buf = NULL; 725 unsigned int write_bytes; 726 int ret; 727 728 /* 729 * Use bounce buffer for non 32 bit aligned txbuf to avoid data 730 * aborts 731 */ 732 if ((uintptr_t)txbuf % 4) { 733 bounce_buf = malloc(n_tx); 734 if (!bounce_buf) 735 return -ENOMEM; 736 memcpy(bounce_buf, txbuf, n_tx); 737 bb_txbuf = bounce_buf; 738 } 739 740 /* Configure the indirect read transfer bytes */ 741 writel(n_tx, plat->regbase + CQSPI_REG_INDIRECTWRBYTES); 742 743 /* Start the indirect write transfer */ 744 writel(CQSPI_REG_INDIRECTWR_START, 745 plat->regbase + CQSPI_REG_INDIRECTWR); 746 747 while (remaining > 0) { 748 write_bytes = remaining > page_size ? page_size : remaining; 749 writesl(plat->ahbbase, bb_txbuf, write_bytes >> 2); 750 if (write_bytes % 4) 751 writesb(plat->ahbbase, 752 bb_txbuf + rounddown(write_bytes, 4), 753 write_bytes % 4); 754 755 ret = wait_for_bit_le32(plat->regbase + CQSPI_REG_SDRAMLEVEL, 756 CQSPI_REG_SDRAMLEVEL_WR_MASK << 757 CQSPI_REG_SDRAMLEVEL_WR_LSB, 0, 10, 0); 758 if (ret) { 759 printf("Indirect write timed out (%i)\n", ret); 760 goto failwr; 761 } 762 763 bb_txbuf += write_bytes; 764 remaining -= write_bytes; 765 } 766 767 /* Check indirect done status */ 768 ret = wait_for_bit_le32(plat->regbase + CQSPI_REG_INDIRECTWR, 769 CQSPI_REG_INDIRECTWR_DONE, 1, 10, 0); 770 if (ret) { 771 printf("Indirect write completion error (%i)\n", ret); 772 goto failwr; 773 } 774 775 /* Clear indirect completion status */ 776 writel(CQSPI_REG_INDIRECTWR_DONE, 777 plat->regbase + CQSPI_REG_INDIRECTWR); 778 if (bounce_buf) 779 free(bounce_buf); 780 return 0; 781 782 failwr: 783 /* Cancel the indirect write */ 784 writel(CQSPI_REG_INDIRECTWR_CANCEL, 785 plat->regbase + CQSPI_REG_INDIRECTWR); 786 if (bounce_buf) 787 free(bounce_buf); 788 return ret; 789 } 790 791 void cadence_qspi_apb_enter_xip(void *reg_base, char xip_dummy) 792 { 793 unsigned int reg; 794 795 /* enter XiP mode immediately and enable direct mode */ 796 reg = readl(reg_base + CQSPI_REG_CONFIG); 797 reg |= CQSPI_REG_CONFIG_ENABLE; 798 reg |= CQSPI_REG_CONFIG_DIRECT; 799 reg |= CQSPI_REG_CONFIG_XIP_IMM; 800 writel(reg, reg_base + CQSPI_REG_CONFIG); 801 802 /* keep the XiP mode */ 803 writel(xip_dummy, reg_base + CQSPI_REG_MODE_BIT); 804 805 /* Enable mode bit at devrd */ 806 reg = readl(reg_base + CQSPI_REG_RD_INSTR); 807 reg |= (1 << CQSPI_REG_RD_INSTR_MODE_EN_LSB); 808 writel(reg, reg_base + CQSPI_REG_RD_INSTR); 809 } 810
